Vulcanizing-core.



W. L. HEINIG & M. JOHNSTON.

VULCANIZIN'G CORE. j

APPLICATION FILED OCT. l2, 1914.

1,167,172. Patented m14, 1916.

WILLIAM L. HEINIG AND MARION A. JOHNSTON, 0F DENVER, COLORADO.

VULCANIZING-CORE.

Specification of Letters Patent.

lPatenten aan. 4, wie.

Application filed 0etobery12, 1914. Serial No. 866,406.

To all whom t may concern Be it known that we, WILLIAM L. I-IEINIGl and MARION A. JOHNSTON, citizens of the United States, residing at Denver, in the county of Denver-and State of Colorado, have invented certain new and useful Improvements in Vulcanizing-Cores; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it `appertains to make and use the same.

\This invention is a core for vulcanizing tubular rubber members such as an automobile tire or shoe, and the objects of the invention are lto prevent the longitudinal stretching of such a core while permitting it to flex and to expand laterally, to provide means whereby the core may be bent l to adapt it to tires .of different size, and,to provide for the inlet of the heating vfluid such as steam and the Outlet of the water of condensation. These objects are accomplished by constructing the core and associated parts in a manner hereinafter described and claimed, and as shown in the drawings wherein- Figure I is a longitudinal sectional view of this device, partly in side elevation, Fig. II is a fragmentary horizontalzsection, andy FigfIII is a cross section on the line A-A of Fig.- I.

' This core has a bodyl which is by preference composed of a piecepjof ordinary commercial steam .hose of proper size and length, andat its ends are closures which are steam fittings when steam i's the heating Huid. That is to say, into each end VAof .the body is inserted a tubular plug 2 enlarged or flanged as at 3 around its inner extremity andv having a threaded bore 4 and a passage 5 connecting a point at about the midlength of said bore'with the inner end of the plug. A pipe 6 is screwed in the Outer end of the bore of one plug and serves to connect the interior of the core with any suitable source of fluid supply such as steam, the pipe 6 'at the opposite end of the core permitting the escape of the iuid or steam and preferably having a drip cock as indicated at 7. Each end of the body 1 of the hose where it sur rounds the plug is preferably reduced as at 9 and inclosed within a split and tapered collar 10, the latter in turn being inclosed by the tapered skirt 11 of a cap 12. The cap is pierced with a hole 13 through which the pipe 6 passes loosely, and a nut 14: is screwed on the pipe to hold the parts in place. By setting up this nut the cap is forced onto the collar so as to compress the latter and clamp the end .of the hose around the plug-thereby preventing leaks. These or like fittings engage the extremities of the hose, and between them the body may be expanded radially to fill the interior of the tire, but it is desired that it shall not expand longitudinally. Hence we connect the plugs by a flexible but inexpansible element. This might be of any suitable character, but

by preference it is composed of a rod made in parts which are loosely connected. Iny

the drawings is shown a rod in two parts 15, threaded at their outer ends as at 16 and screwed into the inner ends of the bores 4 of the plugs; while the inner end of one part 15 is reduced and flattened as at 19, that of the other-part is forked as at 18, its arms .passed astride the reduced end and perforated as at 17, and the parts are then connected by a pivot pin 20. This pivot or joint within the two-part rod stands at `about the midlength of the body 1 and eX- tends horizontally across-it as shown in vIligs. I and I'I, so' that if the tire being cured or vulcanized is small the core can be given a greater curvature than illustrated.

While we do not wish to be confined to the use of steam as the heating fluid, when the same is employed provision ismade for the outlet of the water of condensation from is preferably accomplished by means of a water pipe 21 which is of a material suto permit it to4 lie within the bottom of the tubular core as shown in Fig. I. Its intake -90 the lowest point in the. tubular core. This end stands beneath or substantially beneath the jointin the two-part rod 15, and its outer end is connected with one of said pas- When the core is placed withm the tire being cured 01'- sages as shown in dotted lines.

y vulcanized, as indicated in' dotted lines in` Fig. l, this pipe 21 has its intake end at the lowest point within the core, and the water of condensation will either run out or be Dforced out of the same by the pressure of steam admitted. rl`he process of vulcanizing rubber is well understood, and therefore the use. of this device is obvious.

What is claimed as new is:

l. A core for vulcanizing purposes comprising a flexible tubular member, closures at the ends of the same, means for admitting a fluid heating agent, an internal element connecting vsaid closures and adapted to hold the member against longitudinal stretching, and means for permitting said element to flex, for the purpose set forth.

2. A core for vulcanizing purposes comprising a flexible vtubular member, closures at the ends of the same, means for admitting a fluid heating agent, an element connecting said closures and adapted to hold the member against longitudinal stretching, and jointed means for permitting said element to Hex, for the pulrpose set `forth.

3. A core for vulcanizing purposes coinprising a denible tubular member, plugs closing. the ends thereof and having openings for the circulation of steam-throughout said member, a two-part rod within said member with the outer ends of its parts connected with said plugs, and a joint between the inner ends of said parts.

4. A. core for vulcanizing purposes comprising an expansible tubular member, steam tight closures at the ends thereoan element connected with the ends of said member for holding the same against longitudinal stretching, means for admitting steam into said member, and a water .outlet therefrom having, its intake at the lowest part ot the interior of the core.

5. Amore for vulcanizing purposes comprisinga Hexible tubular member, plugs located in the ends of and forming steamtight kclosures for such member, al bracing element interposed between the plugs and connected thereto, 4means for admitting steam through one of said plugs, and a water outlet pipe'passing through the other plug and having the intake end thereof at the lowest part of the interior of the core.

6. A. core for vulcanizing purposes comprising a radially expansible tubular member, steam-tight closures at the ends ot said member, meansconnecting said closures and preventing the longitudinal stretching of said member, means for admitting steam to said member, and a flexible water outlet pipe having its intake end at the lowest point within said member.

7. A. core for vulcanizing purposes comprising a exible tubular member, plugs closnieuwe ing its'ends and provided with duid inlet andI outlet openings respectively, a two-part e rod within said member with the outer ends of its parts connected with said plugs, a I

Ainner ends of said parts, and a flexible out let pipe leading to one of said passages and with its intake end beneathrsaid joint.A

9. lin a core for vulcanizing purposes, a idexible tubular member, plugs located in the ends of the tubular member, flanges on the inner ends of said plugs, clamping means surrounding the ends of the tlexible member and adapted to grip them against the plugs, means for admitting steam to the member,

and a jointed bracing rod interposed betu tween the plugs.

10. A core :for vulcanizing purposes com prising a flexible tubular member, plugs located in the ends thereof, said plugs adapted to torni a steam-tight connection with the tubular member, a flexible bracing element interposed between the plugs and connected thereto, means providing a steam inlet associated with one oit said plugs, means providing a steam outlet associated with the other of said plugs, vand a water pipe connected with the latter-named plug and having the end thereof:` at the lowest part of the interior of the core. l

1l. core for vulcanizing purposes comprising a dexible tubular member, plugs located within theends thereof, anges formed on the inner ends of the plugs, 'tapered collars surrounding the ends of the tubular member, caps having skirts surrounding the :.1

tapered collars, externally threaded pipes connected to `the outer ends of the plugs, screw-'threadedv means engaging the pipes and adapted to urge the caps along the collars to clamp the ends of the flexible tubular member upon the plugs, and means for adnitting steam to and water from said mem- 12. A core for vulcanizing purposes comprising a Hexible tubular member, plugs located within the ends thereof, ianges formed on the inner ends of the plugs, tapered colf lars surrounding the ends of the tubular member, caps having skirts surrounding the tapered collars, externally threaded pipes connected to the outer ends ont the plugs,

Screw-threaded means engaging the pipes In testimonywhereof We ax our signaand adapted to urge the caps along the co1- tures in presence of two Witnesses.

lars tl? clamp thJ1 endls of the lexille tuular WILLIAM L HEINIG mem er upon t e u s, means or a mt- Y ting steam to and Ivattger from the member MARION A' JOHNSTON' through said pipe, and a jointed element Witnesses:

Within the member having its ends connect- CABLE WHITEHEAD,

ing said plugs, for the purpose set forth. AmsERT L. VoGL. 

